baber/WOPTO huggingface dataset:
Patent GB-114503-A (GB)
Title: Improvements in the Manufacture of Driving Belts or Bands.
Inventor: THAME JAMES
IPC: D21J3/00
Filed: 1917-04-30
Abstract: 114,503. Thame, J. April 30, 1917 Belts.-Material fur links for constructing driving-belts is produced from manilla, jute, or other fibrous material by reducing the fibre to longiibre pulp with water in a beating engine, moulding the pulp in wire-covered vacuum moulds, pressing in wire-covered moulds to express water, drying, treating in a bath of glue or the like, and immersing in a bath of sodium or potassium bichromate or tannic acid. Dextrine or like gum may be added to the material in the beating- engine; the fibre may be boiled or treated with caustic soda before pulping, or the moulded material may be treated with a solution of caoutchouc, balata, or gutta-percha and hardened with sulphur chloride. The links, which may be moulded or cut to shape, are of the form shown in longitudinal and transverse section in Figs. 3 and 5, and may be provided with eyelets such as c or d. The driving faces f of the links are wider than the backs g, and tapering spaces h for the escape of air are left between them when they are jointed together by rods or tubes i to form a belt
Patent GB-399787-A (GB)
Title: Improvements in and relating to systems for producing light of a periodically varying intensity
IPC: H05B41/39
Filed: 1932-02-29
Abstract: 399,787. Control systems for electric discharge lamps. 'BRITISH THOMSONHOUSTON CO., Ltd., Crown House, Aldwych, London.-(Assignees of Westerndorp, W. F. ; 32, N. Ferry Street, Schenectady, New York, U.S.A.) Feb. 29, 1932, No. 6106. Convention date, Feb. 28, 1931. [Class 38 (iv).] A gaseous discharge tube is supplied from a source of A.C. at a commercial frequency and a circuit is associated with the tube which produces modulation of the light emitted at a predetermined frequency, e.g. 1000 cycles per second, for direction finding and like uses in connection with the guidance of aircraft. Fig. 2 shows a neon tube 10, for example, with two anodes connected through inductances 15 to the ends of a transformer winding 14, and a cathode connected through an inductance 17 to' the mid-point of the winding which is excited from the A.C. source. A starting anode 23 is connected through a transformer 33, kick switch 25 and inductance 17 to the winding 14. In parallel with each anode circuit is a circuit containing an inductance 19 and condenser 20 which is tuned to a frequency somewhat in excess of the modulation frequency and which produces oscillations which reduce the anode potential below that of the cathode at the tuned frequency. The tube 10 has control electrodes connected to a source of control potential at the modulation frequency or alternatively, sa shown, the potential changes of the condenser 20 in the tuned circuit 19,. 20 set up oscillations in a circuit 26, 27 tuned to the modulation frequency which are transferred by means of a permalloy strip to a winding 30 in the circuit of the control electrodes. A bias voltage 29 together with the magnetic saturation produced at one end of the permalloy strip cause a brief occurrence of positive potential on the control electrodes once in each cycle of the voltage generated in the tuned circuit 19, 20 which periodically reduces the anode potential below that of the cathode the arrangement thus producing a deep modulation of the light emitted by the tube at the frequency desired. Several tubes may be supplied in parallel and the control electrodes of the tubes may be in parallel or those of the additional tubes may be controlled by additional coils arranged as the coil 30 or by a coil coupled with the inductance 19. The grid voltages of the additional tubes may be obtained from additional windings on the transformer 31 in which case the tube 10 which supplies the grid voltages for all the tubes constitutes a monitor tube.
Patent GB-1514885-A (GB)
Title: Conveyor belt scraper units
IPC: B65G45/12
Filed: 1976-11-02
Abstract: 1514885 Cleaning conveyer belts R F LUKE 2 Nov 1976 [17 Feb 1976] 06108/76 Heading B8A A conveyer belt scraper comprises a wear resistant member 10, e.g. of steel or sintered carbide bonded to a layer or layers of synthetic plastic material which protects the belt from damage by the knife edge formed by wear of the member 10 in use. The scraper may be arranged tangentially or perpendicularly to the belt.
Patent GB-214962-A (GB)
Title: Improvements in concrete building blocks
IPC: E04B2/28
Filed: 1924-03-10
Abstract: 214,962. Ferguson Synstone Co., (Assignees of Ferguson, J. A.). April 27, 1923, [Convention date]. Bricks, special shapes of.-A concrete building block comprises a slab 1 provided with one or more integral lugs 2 projecting from its rear face, said lugs having nail-penetratable material 8 moulded on the free ends thereof, to which laths &c. 9, Fig. 4, may be nailed direct. The rear face of the slab is also provided with recesses 3. 4 formed by a peripheral reinforcing flange 5 and webs 6, 7 of such a depth that the lugs 2 extend beyond them. The blocks are laid with the lugs 2 in vertical alignment, and in such a manner that the slabs 1, lugs, and an inner wall member secured to the nail-penetrable material 8 cooperate to form air spaces, the flanges and webs defining thin-walled pockets opening into said air spaces. Several constructions of walls are described, including one in which an inner layer of concrete blocks is bonded to an outer facing comprising a single layer of bricks.
Patent GB-276894-A (GB)
Title: An automatic fire arm
IPC: F41A5/26
Filed: 1927-03-04
Abstract: 276,894. Destree, J. Jan. 11, 1927, [Convention date]. Breech actions, sliding breech-block.-The movement of the gas piston, or the equivalent, of a gas-operated gun of the kind in which the operative stroke of the piston is effected directly by the gases, is restrained by the gases themselves acting directly on the piston in the reverse direction. As shown in Fig. 1, the barrel 1 has two large gas ports 2, 12 communicating with the ends of a cylinder 3 containing the piston 4 which opens the breech during its backward stroke. When the gun is fired, the gases first enter the front of the cylinder through the port 2 and then, as soon as the projectile has uncovered the port 12, enter the rear end of the cylinder and oppose the movement. An opening 13 or openings leading to the atmosphere may be provided in the cylinder to reduce the braking effect. In the automatic pistol shown in Figs. 2 and 3, the breech-slide 21 is looked by a vertically-sliding bolt 20, 20<a> adapted to be driven down by the gases passing through a port 18<a>. A second port 18<b> in front of the first leads to the other side of the bolt 20 so that the movement of the bolt is damped by a jet of gas driven in the opposite direction. Specification 274,031 is referred to.
Patent GB-1175593-A (GB)
Title: Process for preparing Ethylene Copolymers
IPC: C08F210/18
Filed: 1967-02-09
Abstract: 1,175,593. Ethylene copolymerization. STAMICARBON N.V. 9 Feb., 1967 [9 Feb., 1966], No. 6200/67. Heading C3P. Copolymers of ethylene with at least one other alkene and at least one polyunsaturated compound are prepared by contacting a solution of the monomers with a catalyst derived from a vanadium compound containing chlorine that is soluble in the solvent of the monomer solution and a monoalkylaluminium dihalide (or a mixture thereof with a dialkyl aluminium monohalide), wherein an alcohol or phenol is introduced into the catalyst system and hydrogen chloride is formed and remains therein. In the examples, ethylene, propylene and dicyclopentadiene are continuously terpolymerized using the following catalyst systems: (1) VOCl 3 /ethyl aluminium sesquichloride/methanol, ethanol, n-butanol, n-octanol, cetyl alcohol, allyl alcohol, isopropanol, tert-butanol or phenol (alcohol or phenol added to VOCl 3 ), (2) VOCl 3  and n-butanol added to ethyl aluminium sesquichloride, (3) and n-butanol added to both VOCl 3  and the sesquichloride.
Patent GB-769360-A (GB)
Title: Improvements in or relating to reducing the caking of ammonium sulphate and of salt mixtures essentially comprising the same
IPC: C01C1/248
Filed: 1955-03-02
Abstract: The caking tendency of ammonium sulphate, and of mixtures containing this sulphate as an essential constituent, is reduced by adding a water-soluble cadmium salt to the solid sulphate or to the solid mixture.  Cadmium sulphate, nitrate, or chloride may be used in amount not more than 0.1, preferably 0.001-0.05 per cent. The cadmium salt may be intimately mixed with the sulphate, either by atomizing a dilute aqueous solution on to solid ammonium sulphate, or by adding the salt to a suspension of ammonium sulphate, separating the sulphate from the mother liquor, and drying.
Patent GB-1061882-A (GB)
Title: Improvements in and relating to electrical circuit arrangements
Inventor: TARRANT JOHN SIDNEY
IPC: H04B3/04
Filed: 1964-02-14
Abstract: 1,061,882. Pilot operated automatic volume control; transistor amplifiers. TELEPHONE MANUFACTURING CO. Ltd. Jan. 26, 1965 [Feb. 14, 1964]. No. 6245/64. Heading H3T and H4R. An automatic gain control system includes in its variable attenuator circuit a thermistor TH1, Fig. 2, whose resistance is controlled by the rectified pilot output of the attenuator via the differential amplifier TR1 and TR2, in which the current through the thermistor heater is varied to take account of changes in ambient temperature by including the heater of a second thermistor TH1 in series with the thermistor TH2 the element of the thermistor TH1 being connected in the biasing circuit of a, second differential amplifier TR3, TR4, so that an increase in ambient temperature, which would tend to vary the resistance of thermistor element TH2 and produce the incorrect attentuation, varies the bias on transistor TR4 and thus varies the current 13 in such a way as to maintain the temperature of the thermistor elements constant. A change in rectified pilot signal level applied to input 12 varies the current through the thermistor heaters and thus varies the attenuation provided by the attenuator ineluding thermistor element TH1, the resulting variation in bias on transistor TR4 due to the change in resistance of element TH2 does not effect the current 13 since a corresponding change occurs in the bias on transistor TR3 due to its connection to the collector of transistor TR1. The Zener diodes Z1 and Z2 have characteristic voltages which differ by the voltage difference between V1 and V2 so that with changes in pilot signal level the base currents of TR3 and TR4 remain equal. The effect of ambient temperature variations on the semiconductor rectifier used to rectify the pilot signal filtered from the variable attenuator output is compensated by the circuit disclosed and claimed in Specification 1,061,883. In an alternative embodiment, Fig. 4 (not shown), the thermistor heaters are connected in the collector circuit of TR4 and the stage TR1, TR2 is used solely as a differential amplifier whose output is applied to the input of the second differential amplifier TR3, TR4, the other input of which is fed from a potential divider which includes the thermistor element TH2. A further development of this embodiment is described with reference to Fig. 5 (not shown), in which each pair of transistors of each differential amplifier is replaced by a two-stage pair. In addition, a further two-stage pair is capacitively coupled to the second long-tailed pair of the comparator to form a Miller integrator circuit which determines the speed of response of the circuit to changes in pilot level.
Patent GB-648359-A (GB)
Title: An improved method of manufacturing articles incorporating a tubular portion
IPC: B21C37/15
Filed: 1948-02-28
Abstract: 648,359. Metal tubes. HEATH, I. A., and BRADLEY, W. G. Feb. 28, 1948, No. 6247. [Class 99(ii)] [Also in Groups XI and XIV] A tubular member 10 is formed from two or more sections 10a, 10b, which are preferably die-cast, by bringing the longitudinal edges together and retaining them in position by inserting one end with a push fit into a recess in a complementary member 11 and applying a close-fitting cap or band 12 to the other end. Alternatively, an intermediate part or parts of the assembled sections may be engaged in a hole in a complementary member or members, and bands applied to both ends. As shown, each section 10a, 10b is of right angle shape in cross section and has a web 10c provided with a semi-circular recess whereby the sections may be bolted to the member 11. The member 10 may form the standard for a table lamp, Figs. 4-6 (not shown), companion set &c. the member 11 forming the base whilst the band 12 forms the lamp holder or is provided with hooks. Alternatively members 10a, 10b, 12 may constitute a coffin handle, the intermediate supporting members forming hangers, Figs. 7, 8, (not shown). The member 10 may be of any regular geometrical cross section and is preferably made from zinc base alloys.
Patent GB-715288-A (GB)
Title: Improvements in or relating to a fluid pressure braking system for a vehicle
IPC: B60T17/04
Filed: 1952-03-11
Abstract: 715,288. Fluid-pressure brakes. FAWICK, T. L. March 11, 1952, No. 6275/52. Class 103(1) In a vehicle braking system a wheel-brake is associated with the axle structure 11, 17 and the system comprises two fluid-impelled members 20, 30 operable each independently of the other's operation, for actuating the brake, fluid-confining means 22, 25, 28 being mounted directly upon the said axle structure for containing and effecting actuation of both said members, and respective means each operable independently of the other's operation for supplying pressure fluid to said members alternatively. The control system comprises two independent systems; one air-pressure, the other hydraulic. The air-braking system is of the normal type comprising a motor driven air compressor 39 which supplies air to service tanks 41, 42 which, in turn, supply air, via relay valves 50 and 53 respectively through brake chambers 51, 51 and 54, 54 to the rear wheels of the tractor 51a and the trailer 54a and also air is supplied from the tanks to operate the front brakes of the tractor. In addition to the foregoing normal air braking system is incorporated an hydraulic system consisting of a line 64 from the compressor's output line 40 to a reserve and emergency air pressure tank 67 via a non-return valve 65. From this tank air is supplied via line 68 through a second footoperated valve 69 to a servo-cylinder 70 whose piston-rod 71 is hinged to the outer-end of a piston rod 76 of an hydraulic master cylinder 77 which supplies oil or brake-fluid to brake chambers 51, 51 and 54, 54 to operate the rear brakes of the tractor and trailer respectively and also through a supply line 79 to operate the front brakes of the tractor. The brakes may also be operated in this system by the actuation of the hand-brake lever 96. The brake chambers are situated adjacent the axle structure 11 and consist essentially of two chambers; one operated by air pressure, the other by hydraulic means. Air pressure is admitted to one chamber through a pipe 26 and exerts a pressure on a diaphragm 20 which pushes head 24 of a stem 19 against the resistance of a spring 23. This movement operates rocker arm 18 secured to stem 19 and operates rock-shaft 14 which turns cam head 13 to operate the brake shoes 10 against the brakedrum 12. Hydraulic fluid enters the cylinder 28 by socket 29 and operates piston 30, the stem 31 of which extends through slide bearing 32 and has a flat head 33 which impinges against the diaphragm 20, thus operating the stem 19 as previously described. Special means are provided for disconnecting the coupling at 61 and 63 when the trailer is not required so that no air is admitted to the hydraulic lines when they are uncoupled. Pipe 26 may alternatively be coupled to a source of vacuum to assist in freeing locked brakes should such an emergency arise.
Patent GB-1496318-A (GB)
Title: Cholesta-1,5,7-triene-3beta,25-diol and 25-hydroxy-cholesta-1,5,7-trien-3-one
IPC: C07C67/00
Filed: 1976-02-27
Abstract: 1496318 Cholesta-1,5,7-triene derivatives WISCONSIN ALUMNI RESEARCH FOUNDATION 27 Feb 1976 [28 Feb 1975] 06293/77 Divided out of 1496317 Heading C2U The invention comprises cholesta-1,5,7-triene - 3#,25 - diol (I) and 25 - hydroxycholesta- 1,5,7 - trien - 3 - one (II), and their preparation by the route: cholesterol # cholesteryl acetate # 25 - hydroxycholesteryl acetate # 25 - hydroxycholesteryl (IV) # 25 - hydroxycholesta - 1,4 - dien - 3 - one # 25 - hydroxycholesta - 1,4,6 - trien - 3 - one (III) # II # I, the penultimate step being base-induced isomerization and the other steps being conventional. In variants 6#-methoxy-25-hydroxy- 3α,5-cyclo-5α-cholestane # IV; and IV # III direct. Further conversion of I is as described in parent Specifications and Specification 1,496,319.
Patent GB-249115-A (GB)
Title: Improvements in or relating to valve-mechanism for internal combustion engines
IPC: F01L5/04
Filed: 1926-03-08
Abstract: 249,115. Grace, L. G. March 8, 1926. Valves; valve gear. -Inlet at 22 and exhaust at 23 are connected at the appropriate times with a cylinder port 4 by ports 6 and 7 respectively in a piston valve 5 which receives a combined reciprocating and oscillating motion from a half-speed shaft 10. This shaft is formed with an inclined crank to which the valve rod 11 is attached by a two-part bearing 16, a universal joint 21 being provided between the valve and its rod 11. The piston valve may be provided with a single port co-operating with two cylinder ports.
Patent GB-683710-A (GB)
Title: Improvements in or relating to radio navigation aids for aircraft
Inventor: RUST NOEL MEYER
IPC: G01S1/02
Filed: 1950-03-15
Abstract: 683,710. Radio navigation. MARCONI'S WIRELESS TELEGRAPH CO. Ltd. Dec. 15, 1950 [March 15, 1950], No. 6548/50. Class 40 (vii). A radio aircraft landing aid comprises an installation providing a hyperbolic equi - phase contour pattern with foci on a substantially horizontal line at right angles to the desired approach path and providing also a second contour pattern with foci on a line which is slightly inclined to the vertical and is to one side of the approach line the intersection of one of the second contour surfaces with one of former defining the desired glide path in the desired app embodiment where the installation is arranged to assist landing on the runway R of an aerodrome X stations AA<SP>1</SP> and B are provided at the ends of a line which is at right angles to the desired glide path and bisected by it. These stations may radiate signals providing any form of hyperbolic path-defining system, but a C.W. system such as is described in Specification 683,687 or 683,688 is preferred. Hyperbolic equi-phase contours are provided by the radiations of these stations intersecting the ground plane as shown by the lines consisting of dashes and single dots, in particular the plane 2 containing the required glide path is defined and a crafts' relation to it may be shown on a left-right meter. An additional pair of aerials radiating different frequency signals defining a second hyperbolic contour system are situated at AA<SP>1</SP> one aerial being above the other and being nearer the plane 2. The hyperbolic contours of this pattern cut the plane 2 in such manner as shown by the dash and double dotted lines, the straight line intersection being below ground level. By adjusting the position of the upper aerial in a plane parallel to plane 2 it can be arranged that one of these contours defines a suitable asymptotic glide path 1 and an instrument on a craft using the landing path can be designed to indicate " too high " or " too low " in respect of the glide path. Preferably a third hyperbolic system is included, with stations B and MB roughly in the direction of the approach path, from the contours of which (shown with dashes and triple dots in the Figure) distance along the approach path can be determined. Certain of the aerials may be common to two or even all three of the hyperbolic systems. It is pointed out that the aid may be adjusted to bring an aircraft under the control of an autopilot down to the " critical height " and then, if the pilot does not take control to land, automatically fly the craft up and away again.
Patent GB-1142621-A (GB)
Title: Improvements in hydraulic reciprocating pumps
Inventor: MCKENZIE WILLIAM GEORGE
IPC: F04B9/10
Filed: 1966-02-15
Abstract: 1,142,621. Reciprocating pumps. WALKER MFG. CO. Feb. 15, 1966, No.6573/66. Heading F1A. A piston 24 projects into a pumping chamber 22 having a spring-loaded differential area diaphragm valve 46 controlling an outlet 40 to an outlet connection 72. The piston is biased to the left by a spring 34 abutting the housing 20 and a spring retainer 30 which in turn abuts an axially slidable motor housing 75 biased to the right against stops by a spring 84. A spring 110 engages the end 25 of the piston 24 and a retainer 108 engaged by a shoulder on piston rod 98 which is slidable through the end 25 and movable by the motor. The motor is of the wax pellet type operated by an electric heating element. Initial movement of the rod 98 compresses the spring 110 and continued movement creates the necessary high-pressure to unseat the valve 46. The movement of rod 98 ceases when a ring 107 engages the end 38, thereafter the housing 75 is forced to the left and a switch 114 is tripped to disconnect the heating element. The switch is reset by a member carried by the retainer 30. If the necessary pressure to open the valve 46 is not reached the valve is opened by the end of the rod 98.
Patent GB-830067-A (GB)
Title: Radar systems for search and precision operations
IPC: G01S7/10
Filed: 1956-03-02
Abstract: 830,067. Electric servo-systems. GILFILLAN BROS. Inc. March 2, 1956 [March 31, 1955], No. 6722/56. Class 40 (1). [Also in Group XL (c)] In a radar with a plan position indicator, Fig. 2a (not shown, see Group XL (c)), a deflection coil of the cathoderay tube is rotated synchronously with the aerial by means of a servo-system comprising a selsyn transmitter 20A ganged to the aerial and connected to a selsyn control transformer 510, Fig. 4 (not shown), to generate an A.C. error output which is amplified at 531 and applied together with an A.C. reference signal to a synchronous demodulator 533 to give a corresponding D.C. error signal which is integrated in a doubly clamped integrator 535 to ensure a faster response to signal changes, converted back to A.C. in a modulator 537 and applied through a push-pull amplifier 539 to an A.C. servomotor 540, Fig. 3 (not shown), which drives the deflection coil and also a tachometer 550, Fig. 1 (not shown), providing an A.C. rate signal which is also applied to the amplifier 539. Specifications 676,743, 823,141, 823,142 and 830,069 are referred to.